Onboard surge protector

Abstract

The invention discloses a surge protector which is arranged on a circuit board, and relates to a single-phase fire line and zero line anti-mismatch and full-mode protection method and a top failure light indicating method. According to the connection manner of voltage limiting elements, disconnection trippers, a discharge tube, a remote signalling switch, a diode, a diode and a current limiting resistor, the first disconnection tripper, the first voltage limiting element and the discharge tube are connected in series to form an L/N-PE protection circuit; the second disconnection tripper, the second voltage limiting element and the discharge tube are connected in series to form an N/L-PE protection circuit; the first disconnection tripper, the third voltage limiting element and the second disconnection tripper are connected in series to form an L-N protection circuit; and the diode, the current limiting resistor and the diode are connected in series to form an indicator circuit. According to the invention, protection is realized, and at the same time the limiting voltage is reduced; the risk of misalignment during installation is prevented; and the indicator circuit can indicate a failure condition through light, and has a remote signalling function.

Description

technical field [0001] The invention relates to a board-mounted surge protector, more specifically, to a single-phase live wire and neutral wire anti-misconnection; surge protector. Background technique [0002] Surge protector (SPD), also known as lightning protector, relates to the technical field of lightning protection and overvoltage protection for low-voltage power supply system equipment. Its main function is to discharge a large amount of pulse energy (instantaneous high current) generated by lightning strike induction or system overvoltage on the circuit to the ground in a short time (microsecond level), reduce the potential difference between the device interfaces, and protect the circuit. device of. [0003] For a long time, most surge protectors for high-current power supplies have been installed in the form of guide rails. Even if they are used on the circuit board, they are still in the form of small flow. Most of them use lightning protection modules, varist...

AI Technical Summary

Problems solved by technology

[0003] For a long time, the surge protectors for high-current power supplies have mostly been installed in the form of guide rails. Even if they are used on the circuit board, they are still in the form of small flow. Most of them use lightning protection modules, varistors, gas discharge tubes or TVS diodes to be directly welded on the circuit board. On the other hand, there is no function of thermal disconnection, no failure indication, remote signaling and other functions missing, and the protection mode is single

With the development of miniaturization and integration of electronic components, the area and space of circuit boards with high-density layout components are limited, and the surge protectors with traditional structures cannot meet the needs of the development of existing technologies due to their large volume.

Images